Summary: I have owned many receivers and different system configurations over the years. I sold high end audio for many years and have done quite a bit of set up and instal work. Marantz units are typically very musical and this unit is no different. Powerful, smooth natural sound. However in the year I've been using this unit I have had to set up and re-set up the speaker configuration many many times. One menu option changes, undoes and restricts other menu options.